SimTk/openmm — pull request #500 by leeping (2014-06-29 16:16:34+00:00)
Title: GromacsTopFile parses define value with one extra leading character

When GromacsTopFile reads the `#define` lines, the last character of the variable name got read into the value.

For instance, the following line:

`#define tor_ARG_N_CA_CB_CG_m1 0.0 0.0 1 ; PRM 2 3`

got read in as the following:

`top._defines['tor_ARG_N_CA_CB_CG_m1'] = '1 0.0 0.0 1'`.

The leading `1` is not part of the value. Simply shifting the parser by one character fixes the issue.